/**
 * @File	ApplicationSingleton.java
 * @Package	cn.com.ums.plat.common	
 * 
 * @Version	@Date		@Author	@Brief
 * 0.1		2017-05-17	Conan	新建
 */
package com.plat.common;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * @Class	ApplicationSingleton
 * @Brief	
 */
public class ApplicationSingleton implements ApplicationContextAware {
	private static ApplicationContext applicationContext;
	
	/**
	 * 实现ApplicationContextAware接口的回调方法，设置上下文环境  
	 * @Func	setApplicationContext
	 * @Brief	
	 */
	@Override
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		ApplicationSingleton.applicationContext = applicationContext;
	}

	/**
	 * @Func	getApplicationContext
	 * @Brief	
	 */
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}
	
	/**
    * 获取对象    
    * @param name 
    * @return Object 一个以所给名字注册的bean的实例 
    * @throws BeansException
	 */
	public static Object getBean(String name) throws BeansException {
		return applicationContext.getBean(name);
	}

	  /** 
	  * 获取类型为requiredType的对象 
	  * 如果bean不能被类型转换，相应的异常将会被抛出（BeanNotOfRequiredTypeException） 
	  * @param name       bean注册名 
	  * @param requiredType 返回对象类型 
	  * @return Object 返回requiredType类型对象 
	  * @throws BeansException 
	  */  
	public static Object getBean(String name, Class<?> requiredType) 
			throws BeansException {
		return applicationContext.getBean(name, requiredType);
	}

  /** 
  * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true  
  * @param name 
  * @return boolean 
  */  
	public static boolean containsBean(String name) {
		return applicationContext.containsBean(name);
	}

	  /** 
	  * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 
	  * 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）    
	  * @param name 
	  * @return boolean 
	  * @throws NoSuchBeanDefinitionException 
	  */  
	public static boolean isSingleton(String name) 
			throws NoSuchBeanDefinitionException {
		return applicationContext.isSingleton(name);
	}

	  /** 
	  * @param name 
	  * @return Class 注册对象的类型 
	  * @throws NoSuchBeanDefinitionException 
	  */  
	public static Class<?> getType(String name) 
			throws NoSuchBeanDefinitionException {
		return applicationContext.getType(name);
	}

	  /** 
	  * 如果给定的bean名字在bean定义中有别名，则返回这些别名    
	  * @param name 
	  * @return 
	  * @throws NoSuchBeanDefinitionException 
	  */  
	public static String[] getAliases(String name) 
			throws NoSuchBeanDefinitionException {
		return applicationContext.getAliases(name);
	}
}
